Nazari Nasrin, Golzan Mir Maqsood, Mabhouti Khosro
Department of Physics, Faculty of Sciences, Urmia University, Urmia, Iran.
Sci Rep. 2025 Jul 11;15(1):25169. doi: 10.1038/s41598-025-11393-0.
Spinel ferrites of the chemical formula MNiFeO (M = Mn, Zn) were prepared by minimum doping or contamination values x = %0, %5 through the co-precipitation process. The samples synthesized by Hydrazine hydrate and ethylene glycol surfactant and were annealed at 800 °C. The XRD, SEM, and TEM analyses were investigated. To investigate the frequency-dependent of magnetic permeability (µ) and magnetic loss in NiFeO ferrite, the eddy current and hysteresis loss were measured by impedance spectroscopy and VSM analysis for all samples. In considering the electrical parameters of impedance spectroscopy in the range of 10-10 Hz, the frequency-dependent of real (Z') and imaginary (Z'') part of doped specimens increased and consequently conductivity decreased. All three samples exhibit frequency-dependent dielectric parameters and electric modulus, and might have a potential to react to electromagnetic waves. The µ' value extracted from dielectric data, is negative in low frequency regions and approach nearly zero value by enhancing the frequency for all three samples. The magnetic loss enhanced in doped samples that can be explained by the peak point of eddy current loss in the high frequency range for pure and doped samples. M-H hysteresis loop specified that the saturation magnetization (M) increased by Mn and Zn-doped multi-domain Ni ferrite while the coercivity field (H) decreased. The hysteresis loss increased in Zn-doped and diminished in Mn-doped Ni ferrite. Other magnetic parameters including: anisotropy constant (K), anisotropy field (H), magnetic moment (n) and initial permeability µ were calculated by hysteresis loop.
通过共沉淀法，以最小掺杂或污染值x = 0%、5%制备了化学式为MNiFeO（M = Mn、Zn）的尖晶石铁氧体。样品由水合肼和乙二醇表面活性剂合成，并在800℃下退火。对其进行了XRD、SEM和TEM分析。为了研究NiFeO铁氧体中磁导率（µ）和磁损耗的频率依赖性，通过阻抗谱和VSM分析测量了所有样品的涡流损耗和磁滞损耗。在考虑10 - 10 Hz范围内阻抗谱的电学参数时，掺杂样品的实部（Z'）和虚部（Z''）的频率依赖性增加，因此电导率降低。所有三个样品均表现出频率依赖性的介电参数和电模量，并且可能具有与电磁波反应的潜力。从介电数据中提取的µ'值在低频区域为负，并且随着频率的增加，所有三个样品的µ'值都接近零。掺杂样品中的磁损耗增加，这可以通过纯样品和掺杂样品在高频范围内的涡流损耗峰值点来解释。M - H磁滞回线表明，Mn和Zn掺杂的多畴Ni铁氧体的饱和磁化强度（M）增加，而矫顽力场（H）降低。Zn掺杂的Ni铁氧体中磁滞损耗增加，而Mn掺杂的Ni铁氧体中磁滞损耗减小。通过磁滞回线计算了包括各向异性常数（K）、各向异性场（H）、磁矩（n）和初始磁导率µ在内的其他磁参数。
